@Override
 public void onListsChanged() {
   // refresh list adapter
   mListsAdapter.onListsChanged();
   // update tabs
   mTabs.setViewPager(mPager);
 }
 @Override
 public void onListsChanged() {
   // refresh list adapter
   mListsAdapter.onListsChanged();
   // update indicator and view pager
   mTabs.notifyDataSetChanged();
 }